Infrastructure provisions passed the U.S. House of Representatives, but they may have trouble finding support in Republican-controlled Senate.
The latest infrastructure bill phases out DB-60 air brake control valves manufactured before January 2006 over concerns about their effectiveness in cold weather.
New provisions seek a comprehensive review of the U.S. grade crossing inventory.
Opposing sides shore up as the infrastructure bill gets folded into a trillion-dollar package.
Provisions still face major scrutiny by Republican-controlled Senate.
Amendment more than doubles current minimum of $750,000 for commercial trucks
